De cómo el átomo se convierte en "real" y complejo y adquiere una estructura Authors Jordi Solbes Abstract This article presents the appearance of new particles that question the indivisibility of the atom and the introduction of classical models, which cant explain either the stability of atoms and atomic spectra, leading to Bohr and Sommerfeld to propose their pre-quantum atomic models that do not explain the intensity and width of spectral lines or the existence of privileged directions in the atomic bonds. To explain the structure of atoms, it is necessary to introduce the quantum model. This historical presentation can help familiarize students with the nature of science. Downloads Text complet (Català) Published 2016-01-26 Issue No. 19 (2014) Section Monografia / Història i naturalesa de la química License The intellectual property of articles belongs to the respective authors.On submitting articles for publication to the journal Educació Química, authors accept the following terms:Authors assign to Societat Catalana de Química (a subsidiary of Institut d’Estudis Catalans) the rights of reproduction, communication to the public and distribution of the articles submitted for publication to Educació Química.Authors answer to Societat Catalana de Química for the authorship and originality of submitted articles.Authors are responsible for obtaining permission for the reproduction of all graphic material included in articles.Societat Catalana de Química declines all liability for the possible infringement of intellectual property rights by authors.The contents published in the journal, unless otherwise stated in the text or in the graphic material, are subject to a Creative Commons Attribution-NonCommercial-NoDerivs (by-nc-nd) 3.0 Spain licence, the complete text of which may be found at https://creativecommons.org/licenses/by-nc-nd/3.0/es/deed.en. Consequently, the general public is authorised to reproduce, distribute and communicate the work, provided that its authorship and the body publishing it are acknowledged, and that no commercial use and no derivative works are made of it.Educació Química is not responsible for the ideas and opinions expressed by the authors of the published articles.